Silver Surfer and Eternals/Evolutionary War question

I was reading Silver Surfer Annual #1 which tied into the Evolutionary War storyline and came across this bit where Surfer talks to the Eternals. Does anyone with more knowledge know what the deal is with Olympia not being present when Surfer was there previously? The Eternals think it should have been, and Surfer indicates the Eternals understanding of their own origins may be incomplete, but I can't find any info on the net how this plot point turned out.